Continued expansion of cloud-based and consulting services, which comprised 36% of Q4 revenue:

Q4 Mobile revenue growth exceeded 200% year-over-year

Q4 Site and application acceleration services growth exceeded 150% year over year

Q4 Enterprise cloud storage growth exceeded 40% year-over-year

Q4 Online video platform growth exceeded 110% year-over-year

Achievement of $0.01 of non-GAAP net income per share in Q4, excluding acquisition-related income tax expense

"Limelight Networks' content delivery and cloud-based services have become embedded into the fabric of the Internet, which has, through computers, tablets, smartphones and Internet-connected televisions, become embedded into the fabric of our lives. We believe that our globally distributed, high-performance computing platform, and the solutions that run on it, are unique within the technology industry, positioning us well for continued growth and market share gains in 2011. We are focused on delivering value to our customers and helping them improve the efficacy of their online businesses in a world where content and ad dollars continue to shift online, the mobile web continues its rapid growth, and enterprise IT applications continue to migrate into the cloud," said Jeff Lunsford, chairman and chief executive officer.

Financial Highlights

For the fourth quarter of 2010, the Company reported revenue of $55.2 million, up 64 percent from the fourth quarter 2009 and up 11 percent sequentially from Q3 2010. The Company also reported Adjusted EBITDA of $8.1 million and non-GAAP net earnings, before share-based compensation, litigation expenses, amortization of intangible assets, and acquisition-related expenses, of $1.5 million, excluding acquisition-related income tax expense, or 1 cent per share on a fully diluted basis. GAAP net loss was $6.3 million, or 6 cents per basic share.

For the full year of 2010, the Company reported revenue of $183.3 million, compared to $131.7 million in 2009. The Company also reported Adjusted EBITDA of $25.8 million and non-GAAP net income, before share-based compensation, litigation expenses, amortization of intangible assets, and acquisition-related expenses, of $4.6 million or 5 cents per share on a fully diluted basis. GAAP net loss was $20.4 million, or 22 cents per basic share. A reconciliation of GAAP to non-GAAP net income is included in the tables that are attached to this earnings release.

Capital investments were $8.9 million for the fourth quarter and $34.3 million for the year. The Company ended the year with no bank debt and approximately $69 million in cash and short-term marketable securities.

2011 Outlook

The Company anticipates first quarter revenue to be in the range of $48.0-$49.5 million and full year revenue to increase 15 to 20% over 2010 reported revenue.

Financial Tables

LIMELIGHT NETWORKS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except per share data)

December 31,

December 31,

2010

2009

(Unaudited)

ASSETS

Current Assets:

Cash and cash equivalents

$ 56,741

$ 89,509

Marketable securities

12,009

64,870

Accounts receivable, net of reserves of $7,243 and $9,226 at December 31, 2010 and December 31, 2009

To evaluate our business, we consider and use Non-GAAP net income (loss) and Adjusted EBITDA as a supplemental measure of operating performance. These measures include the same adjustments that management takes into account when it reviews and assesses operating performance on a period-to-period basis. We consider Non-GAAP net income (loss) to be an important indicator of overall business performance because it allows us to illustrate the impact of the effects of share-based compensation, litigation expenses, provision for litigation, amortization of intangibles and acquisition related expenses. We define EBITDA as GAAP net income (loss) before interest income, interest expense, other income and expense, provision for income taxes and, depreciation and amortization. We believe that EBITDA provides a useful metric to investors to compare us with other companies within our industry and across industries. We define Adjusted EBITDA as EBITDA adjusted for operational expenses that we do not consider reflective of our ongoing operations. We use Adjusted EBITDA as a supplemental measure to review and assess operating performance. We also believe use of Adjusted EBITDA facilitates investors' use of operating performance comparisons from period to period. In addition, it should be noted that our performance-based executive officer bonus structure is tied closely to our performance as measured in part by certain non-GAAP financial measures.

The terms Non-GAAP net income (loss), EBITDA and Adjusted EBITDA are not defined under United States generally accepted accounting principles, or United States GAAP, and are not measures of operating income, operating performance or liquidity presented in accordance with United States GAAP. Our Non-GAAP net income (loss), EBITDA and Adjusted EBITDA have limitations as analytical tools, and when assessing our operating performance, Non-GAAP net income (loss), EBITDA and Adjusted EBITDA should not be considered in isolation, or as a substitute for net income (loss) or other consolidated income statement data prepared in accordance with United States GAAP. Some of these limitations include, but are not limited to:

EBITDA and Adjusted EBITDA do not reflect our cash expenditures or future requirements for capital expenditures or contractual commitments;

they do not reflect changes in, or cash requirements for, our working capital needs;

they do not reflect the cash requirements necessary for litigation costs;

they do not reflect the interest expense, or the cash requirements necessary to service interest or principal payments, on our debt that we may incur;

they do not reflect income taxes or the cash requirements for any tax payments;

although depreciation and amortization are non-cash charges, the assets being depreciated and amortized will be replaced sometime in the future, and EBITDA and Adjusted EBITDA do not reflect any cash requirements for such replacements;

while share-based compensation is a component of operating expense, the impact on our financial statements compared to other companies can vary significantly due to such factors as the assumed life of the options and the assumed volatility of our common stock; and

other companies may calculate EBITDA and Adjusted EBITDA differently than we do, limiting their usefulness as comparative measures.

We compensate for these limitations by relying primarily on our GAAP results and using Non-GAAP net income (loss) and Adjusted EBITDA only as supplemental support for management's analysis of business performance. Non-GAAP net income (loss), EBITDA and Adjusted EBITDA are calculated as follows for the periods presented in thousands:

Reconciliation of Non-GAAP Financial Measures

In accordance with the requirements of Regulation G issued by the Securities and Exchange Commission, the Company is presenting the most directly comparable GAAP financial measures and reconciling the non-GAAP financial metrics to the comparable GAAP measures.

LIMELIGHT NETWORKS, INC.

Reconciliation of GAAP Net Income (Loss) to Non-GAAP Net Income (Loss)

(In thousands)

(Unaudited)

Three Months Ended

Twelve Months Ended

December 31,

September 30,

December 31,

September 30,

December 31,

December 31,

2010

2010

2009

2009

2010

2009

GAAP net (loss) income

$ (6,348)

$ (5,954)

$ (9,726)

$ (5,220)

$ (20,351)

$ 34,890

Provision for litigation

--

--

--

--

--

(65,645)

Share-based compensation

4,343

4,554

4,327

4,369

17,401

17,463

Litigation defense expenses

22

9

827

273

2,149

5,412

Acquisition related expenses

169

345

1,481

--

1,527

1,481

Amortization of intangible assets

1,458

1,354

33

59

3,899

92

Non-GAAP net (loss) income

$ (356)

$ 308

$ (3,058)

$ (519)

$ 4,625

$ (6,307)

LIMELIGHT NETWORKS, INC.

Reconciliation of GAAP Net Income (Loss) to EBITDA to Adjusted EBITDA

(In thousands)

(Unaudited)

Three Months Ended

Twelve Months Ended

December 31,

September 30,

December 31,

September 30,

December 31,

December 31,

2010

2010

2009

2009

2010

2009

GAAP net (loss) income

$ (6,348)

$ (5,954)

$ (9,726)

$ (5,220)

$ (20,351)

$ 34,890

Depreciation and amortization

8,342

7,912

6,004

6,645

28,726

26,402

Interest expense

64

6

5

11

77

39

Interest and other income (expense)

(42)

(90)

(149)

(346)

(692)

(1,331)

Income tax (benefit) expense

1,518

287

531

61

(3,052)

1,084

EBITDA

3,534

2,161

(3,335)

1,151

4,708

61,084

Provision for litigation

--

--

--

--

--

(65,645)

Share-based compensation

4,343

4,554

4,327

4,369

17,401

17,463

Litigation defense expenses

22

9

827

273

2,149

5,412

Acquisition related expenses

169

345

1,481

--

1,527

1,481

Adjusted EBITDA

$ 8,068

$ 7,069

$ 3,300

$ 5,793

$ 25,785

$ 19,795

Conference Call

At approximately 4:05 p.m. EST (1:05 p.m. PST), management will host a quarterly conference call for investors. Investors can access this call toll-free at 1-877-388-8480 within the United States or +1 678-809-1592 outside of the U.S. The conference call will also be audiocast live from http://www.llnw.com and a replay will be available following the call from the Company's website.

Safe-Harbor Statement

This press release contains forward-looking statements concerning, among other things, the outlook for the Company's revenues, net loss and stock-based compensation expenses, customer growth, market growth, pricing pressures, expansion into additional market segments, product and services improvements, the integration of acquired businesses and litigation and acquisition related expenses. Forward-looking statements represent the current judgment and expectations of Limelight Networks and are not guarantees and are subject to a number of risks and uncertainties that could cause actual results to differ materially including, but not limited to, risks and uncertainties discussed in the Company's Annual Report on Form 10K and other filings with the Securities and Exchange Commission and the final review of the results and amendments and preparation of quarterly financial statements, including consultation with our outside auditors. Accordingly, readers are cautioned not to place undue reliance on any forward-looking statements. The Company assumes no duty or obligation to update or revise any forward-looking statements for any reason.

About Limelight Networks, Inc.

Limelight Networks, Inc. (Nasdaq:LLNW) provides solutions that enable business and technology decision makers to profit from the shift of content and advertising to the online world, the explosive growth of mobile and connected devices, and the migration of IT applications and services into the cloud. Over 1800 customers worldwide use Limelight's massively scalable software services to engage audiences, enhance brand presence, analyze viewer preferences, optimize advertising, manage and monetize digital assets, and ultimately build stronger customer relationships. For more information, please visit http://www.limelightnetworks.com or follow us on Twitter at www.twitter.com/llnw .

Copyright (C) 2011 Limelight Networks, Inc. All rights reserved. EyeWonder is a trademark of Limelight Networks, Inc. All product or service names are the property of their respective owners.